Nell wrote a check for $48 to pay her monthly water bill, but when balabcing her checkbook, she accidentally recorded it as a credit rather than as a debit. How will her check register compare to her monthly bank statement when she receives it?

When Nell goes to reconcile her bank statement, she will find the error will cause her to have $96.00 more than her true balance. Since she did not deduct the 48, but instead added 48, that equates to a 96 dollar mistake.

We know this because the difference from - 48 to 48 on a number line is 96 spaces.